Gádoros Patrik, Czitrovszky Aladár, Nagy Attila, Holomb Roman, Kocsányi László, Veres Miklós
Department of Atomic Physics, Institute of Physics, Budapest University of Technology and Economics, Műegyetem Rkp. 3, 1111, Budapest, Hungary.
Institute for Solid State Physics and Optics, Wigner Research Centre for Physics, Konkoly Thege M. Str. 29-33, 1121, Budapest, Hungary.
Sci Rep. 2022 Sep 15;12(1):15530. doi: 10.1038/s41598-022-19645-z.
In this work, we present the laser cleaning of a Rubidium vapor cell and the Raman analysis of the contaminant material to be removed. The optical window of the vapor cell had gradually lost transparency due to the development of an opaque layer of unknown composition at the inner side during the normal operation of the cell. Laser cleaning was successfully performed by a frequency-doubled Nd:YAG laser focusing the beam inside the cell, avoiding any possible damage to the window. A single laser pulse was enough to clear away the black discoloration at the focal spot and locally restore the transparency of the window. The Raman spectra of the deposit showed peaks not yet described in the literature. Comparison with known Rubidium germanate spectra and simulation results strongly suggested that the unknown material was Rubidium silicate.
在这项工作中，我们展示了对铷蒸汽池的激光清洗以及对待去除污染物材料的拉曼分析。在蒸汽池正常运行期间，由于内侧形成了一层成分未知的不透明层，蒸汽池的光学窗口逐渐失去透明度。通过将倍频Nd:YAG激光束聚焦在池内成功进行了激光清洗，避免了对窗口造成任何可能的损坏。单个激光脉冲就足以清除焦点处的黑色变色并局部恢复窗口的透明度。沉积物的拉曼光谱显示出文献中尚未描述的峰。与已知的锗酸铷光谱和模拟结果进行比较，强烈表明未知材料是硅酸铷。
